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Black liquid(?) from exhaust

Discussion in 'Technical and Troubleshooting Torque' started by Toefa, Jul 31, 2007.

  1. Not too sure if this is a problem... n00b

    When at home, i park my CBR250RR (1996 model) near a wall which the exhaust is about 100mm away from, when i have warmed the bike up there in the past it has sprayed black liquid all over the place. (nice on a bright orange wall :shock: )

    Today, went to leave work, started the bike, put my hand in front of the 'zorst and got this black crap all over my hands. Unfortunatley i wiped it off before having a whiff to see if it was petrol or water?

    Do you guys know if this is common with bikes/this type of bike? Or could it be that a cyclinder is not firing? Could it just be because i warm it up for a minute or so with the choke on?

    Thanks in advance
  2. That's normal, usually just condensate in teh exhaust, mixed with carbon/soot.
  3. Yup. Perfectly normal.

    A good thrashing will temporarily improve matters.

    Had a CZ whose pipes would fill with an evil mixture of unburned 2-stroke oil, soot and condensate if you spent much time pootling around town in winter. Looked like black porridge. Then I discovered that the least messy way of clearing it out was to go for a long blast in the country. At it's best I could blanket three counties in thick blue smoke before it all burned out :oops: .
  4. Sweet... what a relief :applause:

    Thanks very much guys. I was concerned because i had a Subaru Liberty once that had moisture coming out of the exhaust and it turned out to be cracked head gaskets :eek:hno:

    Thanks for the help !

  5. Its pretty normal. I only found it to have it with the choke being on but if its off its ok. I also seem to smell petrol when the choke is on.